A thankful heart is not only the greatest virtue, but the parent of all the other virtues. [Lat., Gratus animus est una virtus non solum maxima, sed etiam mater virtutum onmium reliquarum.]
"Oratio Pro Cnæo Plancio", XXXIII, as quoted in Hoyt's New Cyclopedia Of Practical Quotations (1922), p. 336-37,
![A thankful heart is not only the greatest virtue, but the parent of all the other virtues. [Lat., Gratus animus est una virtus non solum maxima, sed etiam mater virtutum onmium reliquarum.]](http://cdn.quoteddaily.com/images/marcus-tullius-cicero/a-thankful-heart-is-not-only-the-greatest-virtue-but-the-parent-of-all-the-other-virtueslat-gratus-animus-est.jpg)